Integrate the CoffeeScript Compiler for .coffee files

Simple integration of CoffeeScript support. The code uses the JavaScript
implementation of the CoffeeScript compiler. All *.coffee files get
compiled to JavaScript just before eval(). Additionaly a new command
named /coffe is introduced to run CoffeeScript code straight in the
Minecraft console.
Copied 'YoungPersonsGuideToProgrammingMinecraft.md' to 'YoungPersonsGuideToProgrammingMinecraft-de.md' – German translation can begin
Working on the german translation for YoungPersonsGuideToProgrammingMinecraft-de.md
Start with the introduction
Installation
Translate the variables part
Some quick n' dirty markdown "viewer"
Translate the functions chapter and fix some view issues
Some more translation ...
Optimized the TOC and translated some paragraphs
More german translations and some optimization in the heading stacking